Valentina Doria

Published online at scientificamerican.com on February 6, 2018. When my son was born a few months ago, he quickly established himself as the tyrant of our household, one that ruled with a singular phonetic ultimatum (“Oooo—whaaah”), tiny iron fists clutched in fury, and a face that roiled like the churning sea. His placid silence instantly devolved to wrath, wrath (once...